A selected association in four-wheel-drive automobiles entails a separate unit mounted independently of the transmission. This element receives energy from the transmission by way of a driveshaft after which distributes it to each the entrance and rear axles. In older Ford vehicles, as an illustration, this design allowed for larger flexibility in car configuration and chassis design.
The importance of this structure lies in its adaptability. It supplied benefits in car design, permitting for various wheelbase lengths and body configurations with out necessitating main modifications to the transmission. This impartial mounting additionally doubtlessly simplified upkeep and restore procedures in some cases. Traditionally, it was a standard answer for attaining four-wheel drive in heavier-duty automobiles.